Resolve "reduce eDrive polling"

.gitignore

@@ -4,6 +4,7 @@
 /.idea/workspace.xml
 /.idea/libraries
 /.idea/codeStyles/
+.idea
 .DS_Store
 /build
 /captures

app/src/main/java/foundation/e/drive/operations/ListFileRemoteOperation.java

@@ -155,6 +155,11 @@ public class ListFileRemoteOperation extends RemoteOperation {
                 Log.w(TAG, "LightReadFolderRemoteOperation failed : http " + result.getHttpCode() + ", " + result.getLogMessage()+" => Ignored");
             }
 
+            try {
+                Thread.sleep(150);
+            }catch(InterruptedException e){
+                Log.w(TAG, "listFileRemoteOperation's sleep had been interrupted");
+            }
         } //End of loop
         finalResult = new RemoteOperationResult(RemoteOperationResult.ResultCode.OK);
 

app/src/main/java/foundation/e/drive/services/ObserverService.java

@@ -60,7 +60,7 @@ import foundation.e.drive.utils.ServiceExceptionHandler;
  */
 public class ObserverService extends Service implements OnRemoteOperationListener {
     private final static String TAG = ObserverService.class.getSimpleName();
-    private final static int INTERSYNC_MINIMUM_DELAY = 300000; // min delay between two sync in ms.
+    private final static int INTERSYNC_MINIMUM_DELAY = 900000; // min delay between two sync in ms.
 
     private List<SyncedFolder> mSyncedFolders; //List of synced folder
     private boolean isWorking = false;